TAP2

689121355ENSG00000237599ENSG00000223481ENSG00000232326ENSMUSG00000024339Q03519P36371NM_018833NM_000544NM_001290043NM_011530NP_000535NP_001276972NP_061313NP_035660TAP2 is a gene in humans that encodes the protein Antigen peptide transporter 2. TAP2 is a gene in humans that encodes the protein Antigen peptide transporter 2. The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance. This gene is located 7 kb telomeric to gene family member ABCB2 (TAP1). The protein encoded by this gene is involved in antigen presentation. This protein forms a heterodimer with ABCB2 in order to transport peptides from the cytoplasm to the endoplasmic reticulum. Mutations in this gene may be associated with ankylosing spondylitis, insulin-dependent diabetes mellitus, schizophrenia, and celiac disease. Alternative splicing of this gene produces two products which differ in peptide selectivity and level of restoration of surface expression of MHC class I molecules. This article incorporates text from the United States National Library of Medicine, which is in the public domain.